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Order placed 7-21-05 about 9:00am, Was delevered to Mt. Erie, Il. by UPS at 9:00am 7-22-05. Order was filled exactly as ordered with instructions, Thank You for the prompt, fast service. WOW, Chuck.

Chuck

Mt Erie, IL

Demco A-Frame Couplers
Demco Brake Actuator Couplers

Demco





Demco Reviews and Installation Videos


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Expert Answers about Demco

  • How To Check if Trailer Surge Brakes Are Working Properly On Tandem Axle Boat Trailer
  • Checking the brakes can be done in two ways. The easiest way is to raise one side of the trailer and spin the wheels while someone applies the surge brakes at the coupler. The better way would be to remove each of the wheels and brake drums and activate the brakes while making sure the wheel cylinders and brake assemblies are functioning properly. After this the first thing I would do is bleed the brakes using the trailers surge coupler to force the fluid from the brake lines and make...
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  • Where Can VIN Be Found On Travel Trailer
  • The trailer A-Frame tongue is the first place to check. Look for a ID plate affixed to the frame near the coupler. If the ID plate isn't evident there, check the front storage compartment and look over any exposed frame members in that area. On some travel trailers, The ID plate is actually inside the trailer, inside a storage cabinet.
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  • Fit of Demco # DM8104311 Hydraulic Brake Actuator
  • The Demco # DM8104311 is compatible with 3 inch wide straight trailer tongues. You can see our return policy by clicking the provided link.
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  • Stainless Steel Rotor, Caliper, and Additional Components for 8,000 Pound Dexter Axles
  • We have a couple different options for you to upgrade the components on your boat trailer. For a kit that comes with a hub and rotor, you can use the Kodiak Disc Brake Kit, 13 Inch Hub/Rotor with 8 on 6-1/2 Wheel Bolt Pattern for 8,000 Pound Dexter Axles # K2HR89DDS. This kit comes with dacromet-plated, cast iron rotor-and-hub assemblies, stainless steel calipers, stainless steel caliper mounting brackets, and stainless steel mounting bolts. The bearings, races, and seal measurements...
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  • Recommendation for Installation of a Brake Mounting Flange on a Trailer Spindle and Axle
  • Welding a mounting flange, possible item # 4-35, is a very precise installation. The flanges need to be installed square and concentric to the hub and drum assembly and each other. If the flange is installed incorrectly rapid brake lining wear, improper braking, trailer dog legging, bearing failure, rapid tire wear and, worst of all, weakening of the axle can occur. Usually special jigs are used to install the flange. The jig will keep the flange square and concentric to the axle and...
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  • When Replacing Trailer Brake Lines Is Bleeding the System Required to Get Fluid to Assemblies
  • You will need to bleed the brake system to get all of the air out of the lines after replacing the brake lines. Filling up the master cylinder will get some fluid into the lines but not a whole lot. You will need to keep bleeding them till there are no air bubbles that come of the wheel cylinders. If you have a power bleeder you would not need to actuate the actuator to build pressure as the power bleeder will do that for you. To make bleeding the brakes easier and quicker we have...
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  • Can a Weld-On A-Frame Trailer Coupler be Bolted On Instead of Welded
  • The A-frame couplers we carry, like # 12660-97SP, are weld-on applications and cannot be bolted on to a trailer frame. Any welding should be done by a qualified welder in a shop that works on trailers. The coupler you have reference accepts a 2-5/16 inch diameter ball. I have included a link to all of the A-frame coupler options for you to view.
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  • Key Differences Between Disc Brake and Drum Brake Trailer Coupler and Brake Actuators
  • Drum brake actuators and disc brake actuators use different master cylinders. A disc brake actuator producer a higher psi than a drum brake actuator so the fittings will be a little different as well. The drum brake master cylinder will have a check valve in it that reduces the amount of psi the system puts out. The disc brake models do not have this valve because more pressure is needed to actuate disc brakes The problem could be air in the lines and/or pistons in the calipers that...
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  • Hydraulic Disc or Drum Trailer Brakes for 10 Inch Wheels
  • We have several options for trailer brakes that will fit a 10 inch wheel. For a 10 inch wheel you will need a 8-1/2 inch hub and drum assembly such as # T1544500042 which has a 5 on 4-1/2 bolt pattern. Then for hydraulic drum brakes we have just one option, # T4442000 for the right side and # T4442100 for the left side. These are designed for 3,000 pound axles. For disc brakes we have the following options: For 2,000 pound axles we have # K2HR2D or # K2HR2E. For 3,500 pound axles...
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  • Serial Number Location On Enclosed Trailer
  • The serial number or vehicle identification number for a trailer is normally on a sticker or plate located on the tongue or the front of the trailer. The plate will list the trailer capacity and will usually contain other information such as the trailer's GVWR, the recommended tire size and the manufacturer name.
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  • Comparing Demco Trailer Coupler # DM15000-52 to # 12564
  • The Demco Channel Tongue Trailer Coupler - eZ-Latch - Silver - 2" Ball - Bolt On - 10,000 lbs # DM15000-52 is a bolt on coupler for a pole tongue trailer. It is compatible with 3 inch channel width and has bolt holes in the spacing I've attached in the photo. It has an automatic latch that will allow you to connect when the latch is in the closed position by just dropping the coupler over the ball, the latch with snap into place. It has a silver powder coat finish and is rated for 500-hour...
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  • Difference Between Demco Hydraulic Trailer Brake Actuator DA66B # 8605001 and Previous DA66 Model
  • I spoke with my contact at Demco and he said that there really is no difference between Demco Hydraulic Trailer Brake Actuator DA66B, # 8605001, and the DA66 that you have on your trailer. They just did a name change.
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  • What Braking Assemblies do I Need for Karavan Tandem Axle
  • If the bolt pattern on your axles, for the backing plate, is 2-3/4 inch on center , both of these braking assemblies would fit your 10 inch x 2-1/4 inch trailer brake assemblies. Part # 40715 and # 40716 are what I would recommend. These are the left and right hand side brake assemblies. Since you are going to be backing up an incline you want the least amount of reverse braking which is why I recommend these over the other. The shoes for these assemblies are part # BP04-126. The...
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  • What are the Correct Replacement Wheel Cylinders for Demco Hydraulic Trailer Brakes # 40716
  • If you have Redline brakes (part # 40716 is actually Demco), then you will need to use Redline Wheel Cylinder, # BP17-030 (left) and # BP17-020 (right). The correct replacement wheel cylinder for your hydraulic trailer brake assemblies is determined by the brand and size of brake assembly that is on your trailer.
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  • Removing Surge Coupler-Actuated Brakes from Mc Clain Boat Trailer
  • If you want to deactivate the hydraulic brakes on your boat trailer, you can certainly do so. The simplest way to do this would be to drain the brake fluid from the lines by disconnecting the brake lines from the wheel cylinders and allowing the fluid to drain. You'd then immobilize the articulating portion of the coupler by drilling holes in either side and sliding a bolt through to prevent the coupler from compressing. A better long term option would be to remove the coupler and replace...
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  • What Material Is Used For Fittings On Demco Hydraulic Brake Hose
  • I called my contact at Demco and they told me that the fittings that are used on all of their brake line and hose products like the Hydraulic Brake Hose, part # DM05982 are made of an E-coat Steel. When I asked what E-coating is they said it is a coating process similar to galvanizing.
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  • Steel Thickness of the Demco 6-Hole Adjustable Channel Bracket # DM66134
  • The Demco 6-Hole Adjustable Channel Bracket # DM66134 is pretty thick. The steel thickness used for this is 7/16 of an inch.
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  • Troubleshooting Surge Brakes Locking up When in Reverse
  • With surge brakes, you have a brake actuator applying the needed pressure to the brakes but to be able to back up you will need to have a manual lockout or an electric lockout solenoid, like # T4748800, which will close when you shift the vehicle into reverse, allowing the trailer to be backed up. You may also need a solenoid cover like the Titan # T4835800183, depending on what brake actuator you currently have. Typically surge brakes are found on boat trailers, and commonly the...
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  • Manual Reverse Lockout for Demco D91 Trailer Brake Actuators
  • Yes! The manual reverse lockout kit you are looking for is the # DM5939 for D91 Demco Hydraulic Trailer Brake Actuators. I have linked the product and installation instructions to this page for your convenience.
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  • How to Bleed Trailer Surge Brakes
  • I attached a video that details how to bleed surge brake actuators for you to check out. First top off the master cylinder with appropriate fluid. Next you will want to pump the fluid from the master cylinder. You can do this by unbolting the plate that holds the lever in place and then use that lever to actuate the master cylinder and force the fluid through. On some units, you will have to manually activate it at the point where the hitch ball moves in and out. The model in the video...
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  • Determining If Surge Brake Actuator Has Lockout or If Brakes are Free-Backing
  • The only way to turn a surge brake actuator "off" is to engage a lockout on the actuator. Some actuators have manual lockouts, others have electric lockouts, and some have no way to lock out the actuator. Typically, free-backing brakes are used with actuators that have no lockout. As long as the trailer brakes engaging when your tow vehicle is stopping, the brakes are working correctly. I have attached photos showing a manual lockout and electric lockout to help you determine if your...
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  • Dimensions of Demco # DM14793-81 Trailer Coupler
  • If you look at the diagram that I received from my contact at Demco, you can see several of the dimensions of the # DM14793-81 trailer coupler. If there were other dimensions you were needing, please let me know.
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  • Can Demco Replacement Master Cylinder for Hydraulic Disc Brakes be Used with Drum Brakes
  • Hydraulic drum brakes operate at around 1,000 psi where disc brakes are higher at about 1,500 psi. So the maser cylinder for disc brakes, part # 5672, is not the same as what you need. Instead you need the master cylinder for drum brakes, part # 5650.
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  • Mounting Slot Spacing for Replacement Rails Demco Hijacker 5th Wheel Hitch - Older Models DM6014
  • Replacement Rails for Demco Hijacker 5th Wheel Trailer Hitch - Older Models Item # DM6014 has slots to mount a 5th wheel hitch spaced at 10 inches, 20-1/2, and 29 inches apart on center left to right and approximately 22 inches apart on center front to back.
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  • Boat Trailer Brake Assembly Recommendation for a 3500 UFP Axles
  • Yes, the Demco Hydraulic Drum Brake Assembly # 18787 would be the correct assembly for the right hand side of your trailer and the part # 18788 would be the correct assembly for the left hand side of the trailer. If your current brake assemblies only have a 1-3/4 inch width they are not fully utilizing the 2-1/2 inches of drum width that you measured. The bolt pattern of the flange is also the same as what you have. Check out the picture I attached to see these measurements. These...
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  • Coupler Lock Recommendation for Use with Demco Channel Tongue Trailer Coupler
  • Yes the coupler part # DM13689-52 that you referenced is lockable. For a pin style lock the part # 28012 would work well. Or for a lock that goes around the coupler opening the part # DT25013KA would be a great option. I attached review videos for both locks.
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  • Can Lock Out Solenoid Be Added to Demco Hydraulic Brake Actuator
  • I spoke with my contact at Demco regarding the Hydraulic Brake Actuator # DM8759122 referenced in your question. He stated that the Demco Solenoid Kit # DM5404 can indeed be used with this actuator so the trailer brakes do not activate when shifting into reverse This has a gross towing weight capacity of 8,000 pounds and will mount to straight, 3 inch wide trailer tongues. I have attached a short video demonstration on this product for you to check out.
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  • Recommended Rails And Brackets For 2017 GMC Sierra 1500 And Hijacker FWH24PA 5th Wheel Hitch
  • I reached out to my contact at Demco and for the old FWH-24PA hitch you will need rails # DM6014 as you mentioned that are different from the industry standard size. He said you can use the custom bracket with those rails for your 2017 GMC Sierra 1500, so I recommend using the Demco Hijacker Premier Series Custom Mounting Brackets for 5th Wheel Above-Bed Base Rails # DM8552027 which are a custom fit for your truck. I recommend adding the second 7-way to the bed of your truck for easy...
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  • Best Tandem Axle Hydraulic Brake Line Kit for a Boat Trailer
  • For a tandem axle brake line kit that would work well for your trailer that would come with everything check out the part # DM5425. This comes with all of the fitting, lines and clips needed an would work well. I attached an install video for this kit for you to check out as well.
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  • Recommended Brake Assemblies for Karavan Boat Trailer with 3500 lb Axle
  • For your brake assemblies, I recommend the Demco Hydraulic Brake Kit - Free Backing - Galvanized - 10" - Left/Right Hand Assemblies - 3.5K # 40716-15. These galvanized assemblies will work very well for saltwater or freshwater use, resisting corrosion. The free backing design allows you to back up without using the lockout on your coupler. This will absolutely fit your 3500 lb axle. For your Bearing Buddies, bearings, and seals, you very likely have the standard size 84 spindle...
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